91. Pick out the wrong statement.
92. High refractorinness of refractory bricks means, that it has a
93. Cold crushing strength of fireclay bricks is about __________ kgf/cm2.
94. Maximum apparent porosity of magnesite bricks is about __________ percent.
95. Pick out the wrong statement.
96. Spalling tendency of refractories is reduced by increasing its
97. With increase in the alumina content, the refractoriness of high alumina refractories
98. Which of the following bricks should not be used, if the furnace is to be used intermit-tantly?
99. Crushing strength of a refractory
100. Silica refractories
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